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Linux/sound/soc/codecs/cq93vc.c

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  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /*
  3  * ALSA SoC CQ0093 Voice Codec Driver for DaVinci platforms
  4  *
  5  * Copyright (C) 2010 Texas Instruments, Inc
  6  *
  7  * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
  8  */
  9 #include <linux/module.h>
 10 #include <linux/moduleparam.h>
 11 #include <linux/init.h>
 12 #include <linux/io.h>
 13 #include <linux/delay.h>
 14 #include <linux/pm.h>
 15 #include <linux/platform_device.h>
 16 #include <linux/device.h>
 17 #include <linux/slab.h>
 18 #include <linux/clk.h>
 19 #include <linux/mfd/davinci_voicecodec.h>
 20 #include <linux/spi/spi.h>
 21 
 22 #include <sound/core.h>
 23 #include <sound/pcm.h>
 24 #include <sound/pcm_params.h>
 25 #include <sound/soc.h>
 26 #include <sound/initval.h>
 27 
 28 static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
 29         SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
 30         SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
 31 };
 32 
 33 static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
 34 {
 35         struct snd_soc_component *component = dai->component;
 36         u8 reg;
 37 
 38         if (mute)
 39                 reg = DAVINCI_VC_REG09_MUTE;
 40         else
 41                 reg = 0;
 42 
 43         snd_soc_component_update_bits(component, DAVINCI_VC_REG09, DAVINCI_VC_REG09_MUTE,
 44                             reg);
 45 
 46         return 0;
 47 }
 48 
 49 static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 50                                  int clk_id, unsigned int freq, int dir)
 51 {
 52         switch (freq) {
 53         case 22579200:
 54         case 27000000:
 55         case 33868800:
 56                 return 0;
 57         }
 58 
 59         return -EINVAL;
 60 }
 61 
 62 static int cq93vc_set_bias_level(struct snd_soc_component *component,
 63                                 enum snd_soc_bias_level level)
 64 {
 65         switch (level) {
 66         case SND_SOC_BIAS_ON:
 67                 snd_soc_component_write(component, DAVINCI_VC_REG12,
 68                              DAVINCI_VC_REG12_POWER_ALL_ON);
 69                 break;
 70         case SND_SOC_BIAS_PREPARE:
 71                 break;
 72         case SND_SOC_BIAS_STANDBY:
 73                 snd_soc_component_write(component, DAVINCI_VC_REG12,
 74                              DAVINCI_VC_REG12_POWER_ALL_OFF);
 75                 break;
 76         case SND_SOC_BIAS_OFF:
 77                 /* force all power off */
 78                 snd_soc_component_write(component, DAVINCI_VC_REG12,
 79                              DAVINCI_VC_REG12_POWER_ALL_OFF);
 80                 break;
 81         }
 82 
 83         return 0;
 84 }
 85 
 86 #define CQ93VC_RATES    (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
 87 #define CQ93VC_FORMATS  (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
 88 
 89 static const struct snd_soc_dai_ops cq93vc_dai_ops = {
 90         .digital_mute   = cq93vc_mute,
 91         .set_sysclk     = cq93vc_set_dai_sysclk,
 92 };
 93 
 94 static struct snd_soc_dai_driver cq93vc_dai = {
 95         .name = "cq93vc-hifi",
 96         .playback = {
 97                 .stream_name = "Playback",
 98                 .channels_min = 1,
 99                 .channels_max = 2,
100                 .rates = CQ93VC_RATES,
101                 .formats = CQ93VC_FORMATS,},
102         .capture = {
103                 .stream_name = "Capture",
104                 .channels_min = 1,
105                 .channels_max = 2,
106                 .rates = CQ93VC_RATES,
107                 .formats = CQ93VC_FORMATS,},
108         .ops = &cq93vc_dai_ops,
109 };
110 
111 static int cq93vc_probe(struct snd_soc_component *component)
112 {
113         struct davinci_vc *davinci_vc = component->dev->platform_data;
114 
115         snd_soc_component_init_regmap(component, davinci_vc->regmap);
116 
117         return 0;
118 }
119 
120 static const struct snd_soc_component_driver soc_component_dev_cq93vc = {
121         .set_bias_level         = cq93vc_set_bias_level,
122         .probe                  = cq93vc_probe,
123         .controls               = cq93vc_snd_controls,
124         .num_controls           = ARRAY_SIZE(cq93vc_snd_controls),
125         .idle_bias_on           = 1,
126         .use_pmdown_time        = 1,
127         .endianness             = 1,
128         .non_legacy_dai_naming  = 1,
129 };
130 
131 static int cq93vc_platform_probe(struct platform_device *pdev)
132 {
133         return devm_snd_soc_register_component(&pdev->dev,
134                         &soc_component_dev_cq93vc, &cq93vc_dai, 1);
135 }
136 
137 static int cq93vc_platform_remove(struct platform_device *pdev)
138 {
139         return 0;
140 }
141 
142 static struct platform_driver cq93vc_codec_driver = {
143         .driver = {
144                         .name = "cq93vc-codec",
145         },
146 
147         .probe = cq93vc_platform_probe,
148         .remove = cq93vc_platform_remove,
149 };
150 
151 module_platform_driver(cq93vc_codec_driver);
152 
153 MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
154 MODULE_AUTHOR("Miguel Aguilar");
155 MODULE_LICENSE("GPL");
156 

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